Yes
an electric sight is a "red dot" sight that uses a laser to project a red dot where the airsoft bbs will go when you sight it it.
Never!
Which sight? most have a switch or rotational switch that can be turned off.
FN P90 is a CQB (Close Quarter Battle) weapon. The barrel is short (also in the in the airsoft version) so it will not be effective at long range. You don't need scope. You need a red dot sight. Get an Aimpoint M2 (the most common red dot sight for P90), Holosight 551, or reflex sight. Those will suit for function and fit for the look of your P90.
Unless you have a higher priced or accurate gun, buy high end bb's and take the time to sight it in properly, a red dot or any optics does not do much for the gun.
Yes, but you should have rail mount base attached on the upper receiver of your pulse R74 first.
Buy what you want but here are some suggestions. the SMK 6x36 35mm dayscope, red dot laser aimer, bipod, susat sight, acog sight, red dot sight and finally if you have £15,000 to spend, a BW thermal scope.
The BSA red dot sight test measures how well a person can use a BSA red dot sight on a gun. BSA red dot sights are good for quarter and medium range targets.
The red dot sight from Call of Duty: Modern Warfare 2 was only available during the builds of MW3 and was never actually released for the game. For unknown reasons the red dot sight from MW2 was cut and they used a similar model from the original Modern Warfare but with changes. But an AK-47 with the MW2 red dot sight can be found in MW3 in the spec ops mission "Kill Switch".
Get a red dot sight or reflex sight and create the lens....
There is essentially no difference in the two, they both do the same thing but they look different on the outside. Technically speaking, a red-dot is a reflex sight.
Do you mean DE M89? If your airsoft have a picantinny rail (MIL-STD-1913 rail/STANAG 2324 rail), it can be fitted with any accessories that is subjected to it. You can get this accessories at any airsoft stores.